# Berekencijfers.nl

> A Dutch grade calculation tool that converts test scores to grades using the N-term normalization system commonly used in Dutch education.

## What This Tool Does

Berekencijfers.nl helps teachers and students calculate grades (cijfers) from raw test scores. It uses the Dutch N-term normalization system with configurable parameters:

- **Cesuur** (cut score): The percentage of maximum score needed for a passing grade
- **N-term**: A difficulty adjustment factor (0-200) that compensates for test difficulty
- **Passing grade**: The minimum grade considered passing (typically 5.5 in Dutch education)
- **Maximum score**: The total points available on the test

## How the Grading Formula Works

The Dutch N-term normalization system calculates grades on a 1-10 scale:

1. A cutoff point (cg) is calculated: `maxScore × cesuurPercentage`
2. For scores above the cutoff: grade approaches 10 based on remaining points
3. For scores at or below the cutoff: grade scales from 1 to the passing grade

The N-term adjusts difficulty:
- N-term = 100: neutral (no adjustment)
- N-term > 100: easier grading (higher grades for same scores)
- N-term < 100: stricter grading (lower grades for same scores)

## URL Parameters for Direct Linking

Generate a grade table directly via URL:

```
https://berekencijfers.nl/?passingGrade=5.5&maxScore=50&term=100&linearPercentage=50&pointsType=full
```

### Available Parameters

| Parameter | Description | Valid Values |
|-----------|-------------|--------------|
| `passingGrade` | Minimum passing grade | `5.0`, `5.5`, `6.0` |
| `maxScore` | Maximum test score | `1` to `300` |
| `term` | N-term value | `0` to `200` (steps of 10) |
| `linearPercentage` | Cesuur percentage | `0` to `100` |
| `pointsType` | Score increments | `full`, `half`, `quarter`, `tenth` |

## Key Dutch Terminology

- **Cijfer**: Grade (1-10 scale, where 10 is highest)
- **Cijfertabel**: Grade table showing score-to-grade mapping
- **Cesuur**: Cut score / threshold for passing
- **N-term / Normering**: Difficulty normalization factor
- **Voldoende**: Passing grade (typically 5.5 or higher)
- **Onvoldoende**: Failing grade (below 5.5)

## Features

- **Score Lookup (Score Opzoeken)**: Enter a score to instantly see the corresponding grade
- **Grade Lookup (Cijfer naar Score)**: Enter a target grade to see the minimum score needed
- **Grade Table (Cijfertabel)**: Complete table of all scores and their grades
- **CSV Export**: Download the grade table for Excel or Google Sheets
- **Clipboard Copy**: Copy the table directly for pasting into documents

## Export & Integration

- **CSV Export**: Download complete grade tables as CSV files
- **Clipboard**: Copy tables directly for pasting into spreadsheets
- **URL Sharing**: Share configured calculators via URL parameters
- **No API**: Currently no programmatic API available

## Common Use Cases

1. **Teachers**: Create grade tables for tests and exams
2. **Students**: Check what score is needed for a target grade
3. **Schools**: Standardize grading across departments using shared URLs

## Language

The interface is in Dutch (Nederlands). This llms.txt file is in English to help LLMs understand the tool's functionality while preserving Dutch terminology where appropriate.

## Contact

Website: https://berekencijfers.nl